AverageStatistics.java |
1 /** 2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 /** 24 * The contents of this file are subject to the terms of the Common Development 25 * and Distribution License (the License). You may not use this file except in 26 * compliance with the License. 27 * 28 * You can obtain a copy of the License at http://www.sun.com/cddl/cddl.html and 29 * legal/CDDLv1.0.txt. See the License for the specific language governing 30 * permission and limitations under the License. 31 * 32 * When distributing Covered Code, include this CDDL Header Notice in each file 33 * and include the License file at legal/CDDLv1.0.txt. 34 * 35 * If applicable, add the following below the CDDL Header, with the fields 36 * enclosed by brackets [] replaced by your own identifying information: 37 * "Portions Copyrighted [year] [name of copyright owner]" 38 * 39 * Copyright 2009 Sun Microsystems Inc. All rights reserved. 40 */ 41 42 package com.liferay.portal.monitoring.statistics; 43 44 /** 45 * <a href="AverageStatistics.java.html"><b><i>View Source</i></b></a> 46 * 47 * <a href="RollingAverageStatistics.java.html"><b><i>View Source</i></b></a> 48 * 49 * @author Rajesh Thiagarajan 50 * @author Brian Wing Shun Chan 51 */ 52 public class AverageStatistics extends BaseStatistics { 53 54 public AverageStatistics(String name) { 55 super(name); 56 57 _countStatistics = new CountStatistics(name); 58 } 59 60 public void addDuration(long duration) { 61 _countStatistics.incrementCount(); 62 63 setLastTime(duration); 64 65 if (getMaxTime() < duration) { 66 setMaxTime(duration); 67 } 68 else if ((getMinTime() == 0) || (getMinTime() > duration)) { 69 setMinTime(duration); 70 } 71 72 if (_averageTime == 0) { 73 _averageTime = duration; 74 } 75 else { 76 long span = 0; 77 78 if (_countStatistics.getCount() < getLowerBound()) { 79 span = getLowerBound(); 80 } 81 else if ((_countStatistics.getCount() > getUpperBound())) { 82 span = getUpperBound(); 83 } 84 else { 85 span = _countStatistics.getCount(); 86 } 87 88 _averageTime = (_averageTime * span + duration) / (span + 1); 89 } 90 91 setLastSampleTime(System.currentTimeMillis()); 92 } 93 94 public long getAverageTime() { 95 return _averageTime; 96 } 97 98 public long getCount() { 99 return _countStatistics.getCount(); 100 } 101 102 public void reset() { 103 super.reset(); 104 105 _averageTime = 0; 106 } 107 108 private long _averageTime; 109 private CountStatistics _countStatistics; 110 111 }